feat(TextureSize): Add parameter to define the textureSize

[AnthonyGlt]

Related issue:

https://github.com/iTowns/itowns/issues/2292 https://github.com/iTowns/itowns/issues/2312 https://github.com/iTowns/itowns/issues/2309

Replace the const use for subdivision and texture conversion with a customizable parameter sizeTextureTile

Example: For MVT layer

 const mvtSource = new itowns.VectorTilesSource({
              style: 'https://data.geopf.fr/annexes/ressources/vectorTiles/styles/PLAN.IGN/standard.json',
              crs: 'EPSG:3857',

          });

  const mvtLayer = new itowns.ColorLayer('mvtLayer',{
      source: mvtSource,
      sizeTextureTile:512,
      addLabelLayer: true,

  });

For the globe:

const view = new itowns.GlobeView(viewerDiv, placement, {sizeTextureTile:512});

[AnthonyGlt]

We'll keep it in the layer because we have access to the globe layer from there and then we can affect the tile size for the subdivision. (TODO put a comment in the code)

[AnthonyGlt]

I agree, the name should be changed. subdivisionThreshold is more appropriate but there is sseSubdivisionThreshold already existing.